Can BOZ Drive Headphones? - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th September 2001, 07:30 PM   #1
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Can The Bride of Zen Preamp drive 32 ohm headphones safely?
  Reply With Quote
Old 13th September 2001, 02:50 AM   #2
paulb is offline paulb  Canada
diyAudio Member
 
Join Date: Jun 2001
Location: Calgary
Depends what you mean by safe. But it wouldn't be useful; it's a higher impedance output (1.5K volume pot at the output).
You could use the original Zen or the SOZ. Or you could try some of the excellent designs at:
http://www.headwize.com/
  Reply With Quote
Old 13th September 2001, 03:15 AM   #3
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Thanks, I saw Headwiz earlier today. I like the first single ended design on there. Real simple. Probably get all the parts at Radio Shack and build it in one night.

I have a 5k pot at the out of my BOZ, but that doesn't make it any more compatible.

Thanks

Vince
  Reply With Quote
Old 13th September 2001, 03:47 AM   #4
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
Vince,
You could always cheat and put the pot at the input, like ordinary preamps...

Grey
  Reply With Quote
Old 13th September 2001, 03:56 AM   #5
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
I could easily do that. Then just make a connector for the output to the HeadPhones.

I haven't listened to a hi resolution system in about 4 months. I'm going bonkers.

Vince
  Reply With Quote
Old 13th September 2001, 04:17 AM   #6
diyAudio Member
 
Join Date: Nov 2000
go with the Szekeres MOSFET amp at thew HeadWize site , real nice with Grado cans
  Reply With Quote
Old 13th September 2001, 04:24 AM   #7
paulb is offline paulb  Canada
diyAudio Member
 
Join Date: Jun 2001
Location: Calgary
How about feed the BOZ into the Szekeres? If you need gain.
  Reply With Quote
Old 13th September 2001, 04:35 AM   #8
diyAudio Member
 
Join Date: Nov 2000
funny you ask that-I use the BOZ as my preamp and I have three outputs on it
1-record output from the input selector
2-normal output from volume control to amp
3-pre volume control output
My headphone amp has two switchable inputs,input one is from the rec out,input two is from the pre volume control output.I use this due to my headphone amp having its own volume control,and use the BOZ gain only on sources with not enough gain to drive the amp using the rec out

[Edited by rickcr42 on 09-12-2001 at 11:37 PM]
  Reply With Quote
Old 13th September 2001, 04:48 AM   #9
paulb is offline paulb  Canada
diyAudio Member
 
Join Date: Jun 2001
Location: Calgary
Good idea, switch out the gain stage if you don't need it. Have you tried using your outputs 1 and 2 with the volume set to produce a gain of 1 so as to A/B test the BOZ? I always wondered if the great sound of the Zen series was because they added some distortion. Does it by any chance sound better with the BOZ in circuit?
  Reply With Quote
Old 13th September 2001, 03:34 PM   #10
diyAudio Member
 
Join Date: Nov 2000
Both the BOZ and Szekeres amp use the IRF510 mosfet so have similiar sound,but remember,the BOZ operates in the inverting mode as does the ZEN amp.That means the pair produces a non-inverting signal when used together but when used with a non inverting following stage you will end up with an invrerted signal.The szekeres follower is NON inverting so the result is an invertied signal.

The sound-different in combination but not necessarily wrong.Who knows what the phase is of the recording (how many inverting stages used in the signal chain ?).On some material the difference is like going from an active preamp to a passive line stage , more dynamic and punchy.Is it distortion ? No clue,but sounds good to my ears and that is the bottom line.Some do not like the "MOSFET" sound.When used in Class-A it suits my musical taste like nothing else does.Just my opinion

Rick
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
single tube to drive 300ohm headphones sunrise Tubes / Valves 26 10th March 2009 12:09 PM
Converting a yarland amp to drive headphones arvin Tubes / Valves 0 27th February 2007 01:29 PM
Portable direct drive amplifier for ESL headphones shyfx Solid State 6 11th May 2004 10:54 PM
Will Simple 5687 or Etude 12b4A drive headphones? orangedog Tubes / Valves 2 9th February 2004 08:52 PM
How to use a PIC I/O audio square wave to drive headphones ransom peek Solid State 5 2nd December 2003 10:49 AM


New To Site? Need Help?

All times are GMT. The time now is 05:33 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2